43525609 has 2 divisors, whose sum is σ = 43525610. Its totient is φ = 43525608.

The previous prime is 43525597. The next prime is 43525621. The reversal of 43525609 is 90652534.

It is a balanced prime because it is at equal distance from previous prime (43525597) and next prime (43525621).

It can be written as a sum of positive squares in only one way, i.e., 33028009 + 10497600 = 5747^2 + 3240^2 .

It is a cyclic number.

It is not a de Polignac number, because 43525609 - 2⁵ = 43525577 is a prime.

It is not a weakly prime, because it can be changed into another prime (43525639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21762804 + 21762805.

It is an arithmetic number, because the mean of its divisors is an integer number (21762805).

Almost surely, 2^43525609 is an apocalyptic number.

It is an amenable number.

43525609 is a deficient number, since it is larger than the sum of its proper divisors (1).

43525609 is an equidigital number, since it uses as much as digits as its factorization.

43525609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32400, while the sum is 34.

The square root of 43525609 is about 6597.3941067667. The cubic root of 43525609 is about 351.7614845314.

The spelling of 43525609 in words is "forty-three million, five hundred twenty-five thousand, six hundred nine".